Electronic flow controller

Abstract

The utility model discloses an electronic flow controller which comprises a controller body, an air source inlet and an air source outlet are formed in the controller body, a mounting groove is formed in the lower end of the controller body, and an air inlet and an air outlet are formed in the mounting groove; the gas circuit partition plate is arranged in the mounting groove, and a first gas port and a second gas port are formed in the gas circuit partition plate; the gas path grating is attached to the lower end face of the gas path partition plate, a gas path channel is formed in the gas path grating, the first end of the gas path channel corresponds to the first gas port, and the second end of the gas path channel corresponds to the second gas port; the air inlet and the air outlet are communicated through an air channel and form an air channel, and a flow adjusting piece is arranged on the controller body. The pressing plate is attached to the lower end face of the gas path grating; and the cover plate is detachably and fixedly connected with the controller main body and tightly presses the pressing plate. The electronic flow controller has the technical effects that the measuring range of the electronic flow controller is adjustable, and the use cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of industrial analysis technology, and more specifically, to an electronic flow controller. Background Technology

[0002] In the current market environment for analytical instruments in environmental monitoring, electronic flow controllers are significantly more expensive. This is because most of the high-value materials used in the equipment are imported, which keeps the price and supply of electronic flow controllers at a relatively high level.

[0003] However, electronic flow controllers often require several different flow measurement ranges, which means that existing electronic flow controllers need to be purchased in different models of complete equipment, resulting in increased user costs and poor compatibility. Utility Model Content

[0004] The main objective of this invention is to provide an electronic flow controller that solves the problem in related technologies where the flow measurement range of electronic flow controllers cannot be adjusted, leading to the need for controllers with multiple ranges and resulting in high operating costs.

[0005] To achieve the above objectives, this utility model provides an electronic flow controller, comprising:

[0006] The controller body has an air source inlet and an air source outlet. The lower end of the controller body has a mounting groove with an air inlet and an air outlet. The air source inlet, the air inlet, the air outlet and the air source outlet are connected.

[0007] An air passage partition is provided in the mounting groove. The air passage partition is provided with a first air port and a second air port. The first air port corresponds to the air inlet and the second air port corresponds to the air outlet.

[0008] An air passage grille is attached to the lower end face of the air passage partition. The air passage grille is provided with a plurality of air passage channels. The first end of the air passage channel corresponds to the first air port, and the second end of the air passage channel corresponds to the second air port.

[0009] The air inlet and the air outlet are connected through the air passage to form an air passage. The controller body is provided with a flow regulator, which is used to regulate the flow rate in the air passage.

[0010] A pressure plate, which is attached to the lower end face of the air passage grille;

[0011] A cover plate is detachably and fixedly connected to the controller body and presses against the pressure plate.

[0012] Furthermore, the cover plate is detachably fixed to the controller body by a number of screws.

[0013] Furthermore, the air passage is an elongated through-hole that penetrates the air passage grille;

[0014] The electronic flow controller also includes an air passage sealing gasket, which is disposed between the air passage grille and the pressure plate, and covers one side of the air passage.

[0015] Furthermore, a third air port is provided on the air path partition, and a pressure sensor module and a pressure measuring air path are provided on the controller body. The first end of the pressure measuring air path is connected to the third air port, and the second end is connected to the pressure sensor module.

[0016] Furthermore, a fourth air port is provided on the air path partition, and a differential pressure sensor module and a differential pressure measurement air path are provided on the controller body. The first end of the differential pressure measurement air path is connected to the fourth air port, and the second end is connected to one of the interfaces of the differential pressure sensor module. A branch is provided on the pressure measurement air path, and the branch is connected to another interface of the differential pressure sensor module.

[0017] Furthermore, the controller body is provided with a first sealing ring and a second sealing ring. Both the first sealing ring and the second sealing ring are pressed against the upper surface of the air passage partition. The first sealing ring corresponds to the third air port, and the second sealing ring corresponds to the fourth air port.

[0018] Furthermore, the top surface of the mounting groove is provided with a first sealing groove and a second sealing groove, and the first sealing ring and the second sealing ring are respectively embedded in the first sealing groove and the second sealing groove.

[0019] The upper surface of the gas passage baffle is in close contact with the top surface of the mounting groove.

[0020] Furthermore, the flow regulating component includes a proportional valve, the inlet and outlet of which are respectively connected to the air outlet and the air source outlet.

[0021] Furthermore, compression fittings are provided in both the gas source inlet and the gas source outlet;

[0022] The ferrule connector is threadedly connected to the corresponding gas source inlet and gas source outlet.

[0023] Furthermore, a third sealing groove is provided in the gas source inlet and the gas source outlet, and an O-ring is embedded in the third sealing groove. The O-ring is sealed and fitted onto the outside of the ferrule connector.

[0024] In this embodiment of the invention, a mounting groove is provided at the lower end of the controller body, and an air inlet and an air outlet are provided in the mounting groove. The air source inlet, air inlet, air outlet, and air source outlet are connected. An air path partition is provided in the mounting groove, and a first air port and a second air port are provided on the air path partition. The first air port corresponds to the air inlet, and the second air port corresponds to the air outlet. An air path grille is attached to the lower end face of the air path partition, and a plurality of air path channels are provided on the air path grille. The first end of the air path channel corresponds to the first air port, and the second end of the air path channel corresponds to the second air port. The air inlet and air outlet are connected through the air path channels to form an air path. A flow regulator is provided on the controller body to regulate the flow rate in the air path. A pressure plate is attached to the air path grille. The lower end face; cover plate, the cover plate is detachably fixedly connected to the controller body and presses the pressure plate, so that the measurement range is determined by the air passage on the air passage grille. When there is a need to change the measurement range, the cover plate can be removed from the controller body, the pressure plate and the air passage grille can be taken out in sequence, and the corresponding range air passage grille can be replaced. Then the air passage grille, pressure plate and cover plate can be installed in sequence to form a controller with the corresponding measurement range. This achieves the technical effect of making the measurement range of the electronic flow controller adjustable, and the adjustment method is simple and convenient, reducing the use cost in environments with multiple measurement ranges. In addition, it solves the problem in related technologies that the flow measurement range of electronic flow controllers cannot be adjusted, which leads to the need to use controllers with multiple ranges and high use costs. Attached Figure Description

[0025] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model, making other features, objects, and advantages of the utility model more apparent. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of the electronic flow controller according to an embodiment of the present utility model;

[0027] Figure 2 This is a bottom view of the electronic flow controller according to an embodiment of the present utility model;

[0028] Figure 3 This is a cross-sectional view of the electronic flow controller according to an embodiment of the present invention;

[0029] Figure 4 yes Figure 3 A magnified structural diagram of part A in the middle;

[0030] The components include: 1. Controller body; 2. Compression fitting; 3. Air path sealing gasket; 4. Cover plate; 5. Differential pressure sensor module; 6. Pressure sensor module; 7. Flow regulator; 8. Screw; 9. Air inlet; 10. Air path partition; 101. First air port; 102. Second air port; 103. Third air port; 104. Fourth air port; 11. Air path grille; 110. Air path channel; 12. Pressure plate; 13. Air outlet; 14. Air source outlet; 15. Air source inlet; 16. O-ring seal; 17. Differential pressure measuring air path; 18. Pressure measuring air path; 19. First sealing ring; 20. First sealing groove; 21. Second sealing groove; 22. Second sealing ring. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0032] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein.

[0033] In this invention, the terms "upper," "lower," "inner," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0034] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0035] Furthermore, the terms "set up," "equipped with," "connected," and "fixed" should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In addition, the term "multiple" should mean two or more.

[0037] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] To solve related technical problems, such as Figures 1 to 4 As shown, this utility model embodiment provides an electronic flow controller, including:

[0039] The controller body 1 is provided with an air source inlet 15 and an air source outlet 14. The lower end of the controller body 1 is provided with an installation groove, and an air inlet 9 and an air outlet 13 are provided in the installation groove. The air source inlet 15, the air inlet 9, the air outlet 13 and the air source outlet 14 are connected.

[0040] Air passage partition 10 is provided in the mounting groove. The air passage partition 10 is provided with a first air port 101 and a second air port 102. The first air port 101 corresponds to the air inlet 9 and the second air port 102 corresponds to the air outlet 13.

[0041] Air passage grille 11 is attached to the lower end face of air passage partition 10. Several air passage channels 110 are provided on the air passage grille 11. The first end of the air passage channel 110 corresponds to the first air port 101, and the second end of the air passage channel 110 corresponds to the second air port 102.

[0042] The air inlet 9 and the air outlet 13 are connected through the air passage 110 to form an air passage. The controller body 1 is equipped with a flow regulator 7, which is used to regulate the flow rate in the air passage.

[0043] Pressure plate 12, which is attached to the lower end face of air passage grille 11;

[0044] Cover plate 4 is detachably fixedly connected to controller body 1 and presses against pressure plate 12.

[0045] In this embodiment, the gas inlet 15 and the gas outlet 14 can be located at both ends of the controller body 1 for connection to equipment or containers. A square groove is formed at the lower end of the controller body 1 to create a mounting groove, and an air inlet 9 and an air outlet 13 are formed on the top surface of the mounting groove. The air inlet 9 and the air outlet 13 are located at both ends of the mounting groove, respectively, for gas to flow in and out.

[0046] The gas path baffle 10 is embedded in the mounting groove, with its upper surface fitting against the top surface of the mounting groove. To facilitate gas flow, a first gas port 101 and a second gas port 102 are respectively provided at both ends of the gas path baffle 10. The first gas port 101 corresponds to the air inlet 9, and the second gas port 102 corresponds to the air outlet 13. The outline of the gas path baffle 10 matches the outline of the mounting groove, allowing the gas path baffle 10 to be installed in the mounting groove with a relatively good fit.

[0047] An air passage grille 11 is arranged at the lower end of the air passage partition 10. The air passage grille 11 is a plate-shaped structure with an air passage channel 110. The air passage channel 110 can be a groove formed on the air passage grille 11, or a through hole extending through the air passage grille 11 in the thickness direction, etc. To facilitate gas flow, both ends of the air passage channel 110 on the air passage grille 11 need to be connected to the first air port 101 and the second air port 102 respectively. The gas flowing in from the first air port 101 flows out from the second air port 102 after passing through the air passage channel 110.

[0048] The air inlet 9 and the air outlet 13 are connected via the air passage 110 to form an air passage within the controller body 1. To achieve flow regulation, a flow regulator 7 is provided on the controller body 1. The flow regulator 7 is used to regulate the flow rate within the air passage. The flow regulator 7 can be a proportional valve or other types of regulating valves; this embodiment does not impose any limitations on this.

[0049] Furthermore, ferrule fittings 2 are installed inside the gas source inlet 15 and the gas source outlet 14; the ferrule fittings 2 are threadedly connected to the corresponding gas source inlet 15 and gas source outlet 14. Specifically, the ferrule fittings 2 can be connected to the gas source inlet 15 and the gas source outlet 14 using American standard 10-32-UNF threads, which are suitable for connecting thin materials and thin-walled containers, with good adaptability, high precision, and good strength.

[0050] To ensure sealing performance, a third sealing groove is provided in the gas source inlet 15 and the gas source outlet 14. An O-ring seal 16 is embedded in the third sealing groove and is fitted onto the outside of the ferrule connector 2.

[0051] It is understandable that the dimensions of the gas passage 110 in the thickness direction affect the gas flow rate through the gas passage 110, which in turn affects the flow measurement range of the entire controller. Therefore, the flow measurement range of the controller can be adjusted by replacing the gas grid 11 with a different gas passage 110. In this embodiment, the gas grid 11 is pressed and adhered to the lower surface of the gas partition 10. To fix the gas grid 11, a pressure plate 12 is provided on the lower surface of the gas grid 11. The pressure plate 12 presses against the lower surface of the gas grid 11. At the same time, a cover plate 4 is pressed and fixed on the lower surface of the pressure plate 12. The cover plate 4 is detachably fixed to the controller body 1, thereby pressing the pressure plate 12, the gas grid 11, and the gas partition 10 together.

[0052] In this embodiment, the outer contours of the air passage baffle 10, air passage grille 11, and pressure plate 12 all match the inner contour of the mounting groove. In one embodiment, the cover plate 4 can cover the mounting groove, and the edge of the cover plate 4 is detachably fixed to the controller body 1 by a detachable connector, such as by multiple screws or clips, etc., which is not limited in this embodiment. The upper surface of the cover plate 4 may include a protruding pressing part that matches the inner contour of the mounting groove. During installation, the pressing part enters the mounting groove and presses the pressure plate 12 upward, while the edge of the cover plate 4 adheres to the lower surface of the controller body 1.

[0053] This embodiment achieves the goal of determining the measurement range by the air passage 110 on the air passage grille 11. When there is a need to change the measurement range, the cover plate 4 can be removed from the controller body 1, the pressure plate 12 and the air passage grille 11 can be taken out in sequence, and the corresponding range air passage grille 11 can be replaced. Then, the air passage grille 11, the pressure plate 12 and the cover plate 4 can be installed in sequence to form a controller with the corresponding measurement range. This achieves the technical effect of making the measurement range of the electronic flow controller adjustable, and the adjustment method is simple and convenient, reducing the usage cost in environments with multiple measurement range requirements. In addition, it solves the problem in related technologies that the flow measurement range of electronic flow controllers cannot be adjusted, which leads to the need to use controllers with multiple ranges and high usage costs.

[0054] In one implementation, such as Figure 2 As shown, the cover plate 4 and the controller body 1 are detachably fixed together by a number of screws 8. Specifically, four screws 8 can be used, arranged in pairs on both sides of the cover plate 4.

[0055] In one embodiment, the air passage 110 is an elongated through hole that passes through the air passage grille 11. Multiple elongated through holes can be provided, and the corresponding first air port 101 and second air port 102 can be provided as rectangular openings, so as to correspond to multiple elongated through holes at the same time.

[0056] To ensure that the gas flows according to the gas passage 110, such as Figure 4As shown, in this embodiment, the electronic flow controller also includes an air passage sealing gasket 3, which is disposed between the air passage grille 11 and the pressure plate 12, and covers one side of the air passage 110.

[0057] Specifically, the gas sealing gasket 3 is a square rubber gasket that covers the lower surface of the gas grid 11 after installation. After the pressure plate 12 presses the gas sealing gasket 3, it can prevent gas from flowing out from the gap between the gas grid 11 and the pressure plate 12.

[0058] To facilitate the measurement of gas pressure, such as Figure 3 As shown, in this embodiment, a third air port 103 is provided on the air path partition 10, a pressure sensor module 6 and a pressure measuring air path 18 are provided on the controller body 1, the first end of the pressure measuring air path 18 is connected to the third air port 103, and the second end is connected to the pressure sensor module 6.

[0059] Specifically, external gas enters the controller body 1 through the gas source inlet 15 and flows sequentially through the air inlet 9, the first air port 101, the gas passage 110, the second air port 102, and the air outlet 13, finally exiting through the gas source outlet 14. Simultaneously, the gas flowing into the gas passage 110 flows into the pressure measuring gas passage 18 through the third air port 103 and contacts the pressure sensor module 6, which measures the gas pressure.

[0060] To facilitate the measurement of gas pressure difference, such as Figure 3 As shown, in this embodiment, a fourth air port 104 is provided on the air path partition 10, a differential pressure sensor module 5 and a differential pressure measuring air path 17 are provided on the controller body 1, the first end of the differential pressure measuring air path 17 is connected to the fourth air port 104, and its second end is connected to one of the interfaces of the differential pressure sensor module 5. A branch is provided on the pressure measuring air path 18, and the branch is connected to the other interface of the differential pressure sensor module 5.

[0061] Specifically, the gas flowing into the gas channel flows into the differential pressure measuring gas path 17 through the third gas port 103 and the fourth gas port 104, and the differential pressure is detected by the differential pressure sensor module 5.

[0062] like Figure 3 As shown, since the gas needs to pass through the third gas port 103 and the fourth gas port 104 on the gas path partition 10, a first sealing ring 19 and a second sealing ring 22 are provided in the controller body 1 to ensure sealing. The first sealing ring 19 and the second sealing ring 22 are both pressed against the upper surface of the gas path partition 10. The first sealing ring 19 corresponds to the third gas port 103, and the second sealing ring 22 corresponds to the fourth gas port 104.

[0063] In one embodiment, the top surface of the mounting groove is provided with a first sealing groove 20 and a second sealing groove 21, and a first sealing ring 19 and a second sealing ring 22 are respectively embedded in the first sealing groove 20 and the second sealing groove 21, so that the upper surface of the air passage partition 10 can be tightly fitted with the top surface of the mounting groove.

[0064] In one embodiment, the flow regulating component 7 includes a proportional valve, the inlet of which is connected to the gas outlet 13 and the gas source outlet 14, respectively. Specifically, the gas flowing into the controller body 1 passes through the proportional valve and reaches the gas source outlet 14. The proportional valve can adjust the size of the outlet opening according to the pressure signal from the main control board to achieve the effect of regulating the flow rate.

[0065] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electronic flow controller, characterized in that, include: The controller body has an air source inlet and an air source outlet. The lower end of the controller body has a mounting groove with an air inlet and an air outlet. The air source inlet, the air inlet, the air outlet and the air source outlet are connected. An air passage partition is provided in the mounting groove. The air passage partition is provided with a first air port and a second air port. The first air port corresponds to the air inlet and the second air port corresponds to the air outlet. An air passage grille is attached to the lower end face of the air passage partition. The air passage grille is provided with a plurality of air passage channels. The first end of the air passage channel corresponds to the first air port, and the second end of the air passage channel corresponds to the second air port. The air inlet and the air outlet are connected through the air passage to form an air passage. The controller body is provided with a flow regulator, which is used to regulate the flow rate in the air passage. A pressure plate, which is attached to the lower end face of the air passage grille; A cover plate is detachably and fixedly connected to the controller body and presses against the pressure plate.

2. The electronic flow controller according to claim 1, characterized in that, The cover plate is detachably fixed to the controller body by a number of screws.

3. The electronic flow controller according to claim 1, characterized in that, The air passage is a long strip-shaped through hole that runs through the air passage grille; The electronic flow controller also includes an air passage sealing gasket, which is disposed between the air passage grille and the pressure plate, and covers one side of the air passage.

4. The electronic flow controller according to claim 3, characterized in that, A third air port is provided on the air passage partition, and a pressure sensor module and a pressure measuring air passage are provided on the controller body. The first end of the pressure measuring air passage is connected to the third air port, and the second end is connected to the pressure sensor module.

5. The electronic flow controller according to claim 4, characterized in that, A fourth air port is provided on the air path partition. A differential pressure sensor module and a differential pressure measurement air path are provided on the controller body. The first end of the differential pressure measurement air path is connected to the fourth air port, and the second end is connected to one of the interfaces of the differential pressure sensor module. A branch is provided on the pressure measurement air path, and the branch is connected to another interface of the differential pressure sensor module.

6. The electronic flow controller according to claim 5, characterized in that, The controller body is provided with a first sealing ring and a second sealing ring. Both the first sealing ring and the second sealing ring are pressed against the upper surface of the air passage partition. The first sealing ring corresponds to the third air port, and the second sealing ring corresponds to the fourth air port.

7. The electronic flow controller according to claim 6, characterized in that, The top surface of the mounting groove is provided with a first sealing groove and a second sealing groove, and the first sealing ring and the second sealing ring are respectively embedded in the first sealing groove and the second sealing groove. The upper surface of the gas passage baffle is in close contact with the top surface of the mounting groove.

8. The electronic flow controller according to claim 1, characterized in that, The flow regulating component includes a proportional valve, the inlet and outlet of which are respectively connected to the air outlet and the air source outlet.

9. The electronic flow controller according to claim 1, characterized in that, The gas source inlet and the gas source outlet are equipped with compression fittings. The ferrule connector is threadedly connected to the corresponding gas source inlet and gas source outlet.

10. The electronic flow controller according to claim 9, characterized in that, A third sealing groove is provided in the gas source inlet and the gas source outlet, and an O-ring is embedded in the third sealing groove. The O-ring is sealed and fitted onto the outside of the ferrule connector.

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